The interaction between laser light and living tissue is defined as photobiology. Photobiology can be subdivided into laser-tissue reactions defined as photochemistry and photophysics—that is, stimulation of chemical or physical reactions by laser light.

One of the consequences of our individuality is the way we see ourselves—our self-image, how we perceive ourselves and how we hope and strive to be perceived by other people. One of the consequences of our individuality is the way we see ourselves—our self-image, how we perceive ourselves and how we hope and strive to be perceived by other people.

The gold standard for making a choice is approval of a product by the U.S. Food and Drug Administration (FDA), for use in treating hair loss. The most effective use of hair restoration medication is under the supervision of a physician hair restoration specialist.

Well-balanced dietary intake is essential for cells in hair follicles that produce hair and cycle hair through its anagen-telogen-catagen phases. A diet that is severely deficient in essential nutrients, or deficient in essential nutrients over an extended period of time, can cause malfunction in cells, including the cells in hair follicles.